**ADP1710AUJZ-3-R7: A 150mA, Low-Noise, Low-Dropout Linear Regulator for Space-Constrained Applications**

In the rapidly evolving world of electronics, the demand for compact, efficient, and reliable power management solutions continues to grow. The **ADP1710AUJZ-3-R7** from Analog Devices stands out as a critical component designed to meet these challenges, particularly in space-constrained applications. This 150mA, low-noise, low-dropout (LDO) linear regulator integrates high performance into an ultra-small package, making it an ideal choice for portable devices, medical instruments, and communication modules.

**Key Features and Performance**

The ADP1710AUJZ-3-R7 delivers a stable **fixed 3.0V output** with an impressive maximum dropout voltage of only 110mV at 150mA load. This low dropout characteristic ensures efficient operation even when the input voltage is very close to the output level, preserving battery life in portable applications. Furthermore, it boasts an **ultra-low noise performance of 9μV RMS** (10Hz to 100kHz), which is crucial for powering noise-sensitive components like RF transceivers, precision sensors, and audio circuits without degrading signal integrity.

Its **high power supply rejection ratio (PSRR)** of up to 72dB at 1kHz effectively blocks ripple and noise from the input supply, providing a clean and stable output voltage. The device operates over a wide input voltage range from 2.5V to 5.5V, accommodating various power sources including lithium-ion batteries and 5V rails.

**Designed for Miniaturization**

Housed in a **tiny 1.0mm x 1.5mm WLCSP (Wafer Level Chip Scale Package)**, the ADP1710AUJZ-3-R7 addresses the critical need for board space savings. This minuscule footprint allows designers to place the regulator very close to the point-of-load (PoL), minimizing parasitic inductance and improving transient response. Despite its small size, it incorporates essential protection features such as **current limiting and thermal shutdown**, safeguarding both the regulator and the downstream circuitry under fault conditions.

**Application Versatility**

The combination of low noise, high PSRR, and a small form factor makes this LDO exceptionally versatile. It is perfectly suited for powering the core voltages of FPGAs, ASICs, and microcontrollers in densely packed PCBs. In battery-powered Internet of Things (IoT) devices, its low quiescent current helps extend operational life. Additionally, it serves as a post-regulator after a switching DC-to-DC converter, filtering out switching noise to provide a clean analog or digital supply rail.

**ICGOODFIND Summary**

The ADP1710AUJZ-3-R7 is a superior low-dropout linear regulator that expertly balances performance, size, and efficiency. Its **exceptional noise performance**, **high PSRR**, and **ultra-compact package** make it an indispensable solution for modern electronic designs where space and signal purity are at a premium.

**Keywords:**

Low-Dropout (LDO) Regulator

Low Noise

Space-Constrained Applications

Power Supply Rejection Ratio (PSRR)

Wafer Level Chip Scale Package (WLCSP)